Pressure-regulating valve.



'E. V. ANDERSON.

PRESSURE REGULATING VALVE.

APPLICATION FILED MAY 5.1915. RENEWED JUNE 14. ms.

Patented July 25, 1916.

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EDWARD V. ANDERSON,

OF MONESSEN, PENNSYLVANIA, ASSIGNOR. 0F ONE-HALF TO CHARLES E. GOLDEN,OF GRAFTON, PENNSYLVANIA.

PRESSURE-REGULATING VALVE.

Application filed'May 5, 1915, Serial No. 26,071.

To all whom it may concern:

Be itknown that I, EDWARD V. ANDERSON,

a citizen of the United'States, residing at Monessen, in the State ofPennsylvania, have invented certain new and useful Improvements inPressure-Regulating Valves, of which the following is a specification.My invention relates more particularly tovalves designed to be openedwide immediately upon reduction of a predetermined amount of pressure onthe low pressure side of the valve, as for example, in fire servicepipes.

I have illustrated the improvements in a preferred form in theaccompanying drawing, in which:

Figure 1 is a vertical central section of the valve with the connectedoperating parts; Fig. 2 represents a partial side elevation of amodified form of mounting for the regulating weight, and Fig. 3 is asection of said weight along the line (3) in Fig. 2.

As shown in the drawing, I provide a casing 4, with the central chamberdivided by the perforated partition carrying a valve seat 5, and twoadditional chambers respectively above and below this. The main valve 6is provided with an upward cylindrical extension 7 of the same diameteras the valve seat 5, and this cylinder fits tightly in the chamberformed by the liner 8, so that the main valve is cushioned both inopenin and closing. Meantime there is no verticzfi pressure on top ofthe valve by reason of its being the same size as the seat. The valvestem 9 has an upward extension outside the main casing, and carriesshort gear 10 in mesh with two pivoted partial gears 11, mounted on thecap 4 on top of the main casing 4. The gears 10 carry extension arms 12on which are weights 13, which may be in form of spheres, and may befixed at any desired point by set screws 13*.

Below the main chamber of the valve casing, the valve stem 9 has anextension 14 carrying a dash-pot piston 15 operating, in a chamber 15?,and also a sealed piston 16 operating in an enlarged chamber 16preferably formed by a liner in the main valve casing, held in place bythe lower cap containing the port (17) to the atmosphere.

Normally the valve will be opened by the upward pull of the weights 13until the Specification of Letters Patent.

square bar,

Patented July 25, 1916. Renewed June 14, 1916. Serial 110,103,693.

pressure on the outlet side to the left is sufiiciently high to preventfurther rise when operating on the piston 16 through the port 16.Obviously the pressure on the low pressure side therefore will beregulated by the positionsof the weights 13, and obviously ifthepressure on the low pressure side, and therefore on top of the piston16, should fall below :the desired pressure, the valve will rise. It isparticularly important that when the valve does open at all it shouldopen to a considerable extent, and not merely vibrate and chatter as isso often the case with such valves. I accomplish this object by reasonof the peculiar mounting of the weights for opening the valve. It willbe observed that the lever arm between the center point (a) and the rack10 is always the same, and that upon any downward movement of theweight13 the lever arm (a), (b), of this weight will lengthen to thepoint (0;), (c). That is to say, the valve cannot move suddenly, andwhen it moves at all it is subjected to a greater effort as it rises.Meantime the valve is further cushioned by the air cushion in thechamber 8, and by the water cushion inthe chamber 15 This constructionhas in practice shown a peculiar smoothness and certainty of operation,which has heretofore been almost unattainable in such valves, especiallywhen used in very high pressure.

In Figs. 2 and 3 I have shown a modification in which the increase inthe effort of lifting the valve is accelerated as it opens. That is thearm 18 or the rack 11 mounted on pivot 11 may be made in the form of aand the weight in the form of two disks 19 preferably carrying a roller20, and having stop pins 21 and 22 at the limits of motion. Normally thedisks 19 will lie against the pin 22, and when the valve has openedsufiiciently to move the arm 18 to the horizontal position, the diskswill move out to the end of the arm against the pin 21. This form isparticularly valuable where it is desired that when the valve opens atall it shall remain open.

In both forms of the device the arrangement is such that there is alwaysa down pressure on the valve rod 9, and an up pressure on the teeth ofthe rack 11, so that there is no lost motion or looseness of play; and

this in connection with the constancy of the lever arm at this end ofthe lever is of great importance in the proper functioning of thedevice. Other advantages will readily occur to those familiar with theart.

Having thus described my invention and illustrated its use, what I claimis the following:

1. A valve comprising a casing, a perforated diaphragm with a valveseat, main valve having a stem extending upward and downward therefrom,a dash-pot chamber in the casing of the same size and containing thevalve, dash-pot chamber on the lower end of the valve stem and a secondpiston operating in a cylindrical portion of said casing and subjectedto low pressure, a gear and weighted lever connected to the upper end ofthe stem and adapted to exert constant upward pressure on the valvestem,

and to increase said pressure as the valve moves to open position.

2. A regulating valve comprising a casing having a perforated diaphragmwith a valve seat, a main valve in the form of a hollow cylinder, achamber in the casing fitting said cylinder to form a dash-pot, a secondand larger cylinder also on the valve stem, and a chamber in the casingforming the closed space therewith and subjected to low pressure in theline, means to normally exert a lifting force on the valve balancedagainst the downward force on said latter dash-pot piston, and a deviceto increase the upward efiort on the valve when it attempts to rise off,its seat, substantially as described.

In testimony whereof I have hereunder signed my name.

EDWARD V. ANDERSON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

